Gatsby's Vineyard

Description for GATSBY'S VINEYARD by A E Maxwell:

With his feet firmly planted in California wine country and torchy ex-wife Fiora at his side, what more could the inimitable, unflappable Fiddler desire? How about Sandra, ex-flame and Napa Valley vineyard owner, who is in dire need of Fiddler's detection talents? Sandra has had a run of bad luck and bad business. A rare and deadly blight has suddenly and suspiciously infested all the best vineyards, including hers. Every vine in the valley could perish, unless Fiddler can get to the root of a mystery ripe with danger. As clouds of financial doom thunder overhead, Fiddler follows a twisting trail of clues that leads to a millionaire developer with billion-dollar dreams, and vintage violence fermenting from a powerful brew of vengeance and greed.

This is #3 in A Fiddler And Fiora Mystery.